Actually, there is one big difference between a typosquatter and what Neustar is doing. A typosquatter is, essentially, purchasing a domain name that is close to a trademarked name. But Neustar is not buying anybody's domain. It's just taking an unresolved query and redirecting it to a PPC search engine. If a trademark owner wants to buy a mispelling that's close to his trademarked name, it can do so.